public void performTest() throws Exception {
super.performTest();
byte[] keyBytes = new byte[16];
_engine.init(true, new KeyParameter(keyBytes));
//
// init tests
//
try {
byte[] dudKey = new byte[6];
_engine.init(true, new KeyParameter(dudKey));
fail("failed key length check");
} catch (IllegalArgumentException e) {
// expected
}
try {
byte[] iv = new byte[16];
_engine.init(true, new ParametersWithIV(null, iv));
fail("failed parameter check");
} catch (IllegalArgumentException e) {
// expected
}
testNullCBC();
testNullSIC();
testNullOFB();
testNullCFB();
}
/**
* Dekodiert einen Block mit DES
*
* @param key Byte-Array enthält den 3DES-Schlüssel
* @param z verschlüsselter Block
* @return entschlüsselter block
*/
@Override
public byte[] decryptBlock(byte[] key, byte[] z) {
byte[] s = new byte[16];
KeyParameter encKey = new KeyParameter(key);
BlockCipher cipher = new DESedeEngine();
cipher.init(false, encKey);
cipher.processBlock(z, 0, s, 0);
return s;
}